Barium sulphate, ROTI®METIC 99,99 % (4N), Molar mass (M) 233,39 g/mol, Density (D) 3,97 g/cm³, Boiling point (bp) 1600 °C, CAS No. [7727-43-7], EG-Nr. 231-784-4, Empirical formula BaSO4